I wish you had asked these questions about 2 weeks ago when I had clusters of them all over my tree. lol. I believe they are pure white. I have a new flower bud forming on one of my tips again and it's pure white even when tiny. Another clue is that I noticed that there is a scent, but not a heavy one like a Meyer or many others. For the lack of a better word, it's different. I noticed on a fully formed flower that it looks like it has faint brownish looking freckles which remind me of pores. I will watch the bud grow and get back to you on this thread.

pictures?

Hard to photograph under these dumb lights, but here’s the weird area where all the branches originate.

Two photos of white flowers/buds and a poor pic of a purple tinged bud. The previous purple tinged bud bloomed and fell off already, but it looked similar to a Meyer flower.

The UCR page for the variety does show some slight purple tinge on the petals: https://citrusvariety.ucr.edu/citrus/lemonade.html so who knows!

My tree has been inside since October. Do you think the lack of exposure to outside sunlight has anything to do with the blossom color? Interesting that mine are white and the photo shows a touch of pink. Whenever I see conflicting information about any of my trees, I wonder if I received the right variety. Mix ups do happen.

Denise is correct; light intensity and spectrum can change flower coloration. My Meyer lemon will put out mostly white flowers indoors, but if I put them outside, the small flower buds are almost purple in color.

Interesting. But the various branches of mine are putting out white and purple buds under the same conditions. I guess I should wait and see.

Ok, here are better photos of the weird graft site. You can see old parafilm in there so I know this is the site. You can kind of see one branch that is woodier than the others that seems to come from what might be a cleft or side graft. I worry that that might be the only part of the scion that is true. It’s just so hard to tell with this shape.

My NZL has flowered many times but I can't remember the coloration. I can tell you the are just short of odorless.

Steve